Buggy code:
public final class PortletUtilsTests extends TestCase { public void testGetTempDirWithNullPortletContext ( ) throws Exception { } public void testGetTempDirSunnyDay ( ) throws Exception { } public void testGetRealPathInterpretsLocationAsRelativeToWebAppRootIfPathDoesNotBeginWithALeadingSlash ( ) throws Exception { } public void testGetRealPathWithNullPortletContext ( ) throws Exception { } public void testGetRealPathWithNullPath ( ) throws Exception { } public void testGetRealPathWithPathThatCannotBeResolvedToFile ( ) throws Exception { } public void testPassAllParametersToRenderPhase ( ) throws Exception { } public void testGetParametersStartingWith ( ) throws Exception { } public void testGetParametersStartingWithUnpicksScalarParameterValues ( ) throws Exception { } public void testGetParametersStartingWithYieldsEverythingIfTargetPrefixIsNull ( ) throws Exception { } public void testGetParametersStartingWithYieldsEverythingIfTargetPrefixIsTheEmptyString ( ) throws Exception { } public void testGetParametersStartingWithYieldsEmptyNonNullMapWhenNoParamaterExistInRequest ( ) throws Exception { } public void testGetSubmitParameterWithStraightNameMatch ( ) throws Exception { } public void testGetSubmitParameterWithPrefixedParameterMatch ( ) throws Exception { } public void testGetSubmitParameterWithNoParameterMatchJustReturnsNull ( ) throws Exception { } public void testGetSubmitParameterWithNullRequest ( ) throws Exception { } public void testPassAllParametersToRenderPhaseDoesNotPropagateExceptionIfRedirectAlreadySentAtTimeOfCall ( ) throws Exception { } public void testClearAllRenderParameters ( ) throws Exception { } public void testClearAllRenderParametersDoesNotPropagateExceptionIfRedirectAlreadySentAtTimeOfCall ( ) throws Exception { } public void testHasSubmitParameterWithStraightNameMatch ( ) throws Exception { } public void testHasSubmitParameterWithPrefixedParameterMatch ( ) throws Exception { } public void testHasSubmitParameterWithNoParameterMatch ( ) throws Exception { } public void testHasSubmitParameterWithNullRequest ( ) throws Exception { } public void testExposeRequestAttributesWithNullRequest ( ) throws Exception { } public void testExposeRequestAttributesWithNullAttributesMap ( ) throws Exception { } public void testExposeRequestAttributesWithAttributesMapContainingBadKeyType ( ) throws Exception { <START_BUG> new org . springframework . test . AssertThrows ( IllegalArgumentException . class ) { <END_BUG> public void test ( ) throws Exception { org . springframework . mock . web . portlet . MockPortletRequest request = new org . springframework . mock . web . portlet . MockPortletRequest ( ) ; java . util . Map attributes = new java . util . HashMap ( ) ; attributes . put ( new Object ( ) , "bad<seq2seq4repair_space>key<seq2seq4repair_space>type" ) ; PortletUtils . exposeRequestAttributes ( request , attributes ) ; } } . runTest ( ) ; } public void testExposeRequestAttributesSunnyDay ( ) throws Exception { } public void testExposeRequestAttributesWithEmptyAttributesMapIsAnIdempotentOperation ( ) throws Exception { } public void testGetOrCreateSessionAttributeWithNullSession ( ) throws Exception { } public void testGetOrCreateSessionAttributeJustReturnsAttributeIfItAlreadyExists ( ) throws Exception { } public void testGetOrCreateSessionAttributeCreatesAttributeIfItDoesNotAlreadyExist ( ) throws Exception { } public void testGetOrCreateSessionAttributeWithNoExistingAttributeAndNullClass ( ) throws Exception { } public void testGetOrCreateSessionAttributeWithNoExistingAttributeAndClassThatIsAnInterfaceType ( ) throws Exception { } public void testGetOrCreateSessionAttributeWithNoExistingAttributeAndClassWithNoPublicCtor ( ) throws Exception { } public void testGetSessionMutexWithNullSession ( ) throws Exception { } public void testGetSessionMutexWithNoExistingSessionMutexDefinedJustReturnsTheSessionArgument ( ) throws Exception { } public void testGetSessionMutexWithExistingSessionMutexReturnsTheExistingSessionMutex ( ) throws Exception { } public void testGetSessionAttributeWithNullPortletRequest ( ) throws Exception { } public void testGetRequiredSessionAttributeWithNullPortletRequest ( ) throws Exception { } public void testSetSessionAttributeWithNullPortletRequest ( ) throws Exception { } public void testGetSessionAttributeDoes_Not_CreateANewSession ( ) throws Exception { } public void testGetSessionAttributeWithExistingSession ( ) throws Exception { } public void testGetRequiredSessionAttributeWithExistingSession ( ) throws Exception { } public void testGetRequiredSessionAttributeWithExistingSessionAndNoAttribute ( ) throws Exception { } public void testSetSessionAttributeWithExistingSessionAndNullValue ( ) throws Exception { } public void testSetSessionAttributeWithNoExistingSessionAndNullValue ( ) throws Exception { } public void testSetSessionAttributeWithExistingSessionAndSpecificScope ( ) throws Exception { } public void testGetSessionAttributeWithExistingSessionAndSpecificScope ( ) throws Exception { } public void testGetSessionAttributeWithExistingSessionDefaultsToPortletScope ( ) throws Exception { } private static int countElementsIn ( Enumeration enumeration ) { } private static final class NoPublicCtor { private NoPublicCtor ( ) { } } }

Fix:
new org . springframework . test . AssertThrows ( ClassCastException . class ) {